feat: PXE setup now fully functional for inventory agent

The process will setup DHCP dnsmasq on opnsense to boot the correct ipxe file depending on the architecture
Then ipxe will chainload to either a mac-specific ipxe boot file or the fallback inventory boot file
Then a kickstart pre script will setup the cluster ssh key to allow ssh connections to the machine and also setup and start harmony_inventory_agent to allow being scraped

Note: there is a bug with the inventory agent currently, it cannot find lsmod on centos stream 9, will fix this soon

examples/okd_pxe/templates/fallback.ipxe.j2

@@ -30,7 +30,7 @@ echo "Configuring kernel boot arguments..."
 # - inst.ks:                CRITICAL: Points to our Kickstart file for automation.
 # - ip=dhcp:                Ensures the live environment configures its network.
 # - console=...:            Provides boot output on both serial and graphical consoles for debugging.
-imgargs vmlinuz initrd=initrd.img inst.stage2=${os_base_url} inst.ks=${ks_url} ip=dhcp console=ttyS0,115200 console=tty1
+imgargs vmlinuz initrd=initrd.img inst.sshd inst.stage2=${os_base_url} inst.ks=${ks_url} ip=dhcp console=ttyS0,115200 console=tty1
 
 echo "Booting into CentOS Stream 9 live environment..."
 boot || goto failed